Electrolysis treatment process and device for low-content organic pollutants in high-salinity rare earth wet smelting wastewater

Abstract

The invention discloses an electrolysis treatment process and device for low-content organic pollutants in high-salinity rare earth wet smelting wastewater. The electrolysis treatment process comprises the following main steps: (1) oil removal of the wastewater; (2) pH regulation and coagulating sedimentation for heavy metal removal of the wastewater; (3) chlorine peroxidation treatment of the wastewater; (4) electrolysis treatment of the wastewater; (5) reduction, flocculation and sedimentation of the wastewater; (6) activated carbon filtration treatment of the wastewater. According to the electrolysis treatment process and device, aiming at the refractory characteristic of organic matter in the high-salinity rare earth wet smelting wastewater, the organic matter is decomposed and mineralized under the electrolysis action and the strong oxidation action of produced chlorine, and up-to-standard discharge of the wastewater is realized.

Description

technical field [0001] The invention relates to an electrolytic treatment process for organic pollutants in wastewater, which belongs to the field of industrial wastewater treatment, and in particular to an electrolytic treatment process and device for organic pollutants in high-salinity rare earth wet smelting wastewater. Background technique [0002] my country is rich in rare earth resources. The world and China's rare earth resource reserves and basic reserves are 88 million tons (REO, the same below) and 150 million tons, 27 million tons and 89 million tons respectively, and their resource reserves and basic reserves rank first in the world. The main rare earth resources are Baiyun Obo mixed rare earth mine in Inner Mongolia, Maoniuping in Mianning, Sichuan, bastnaesite in Weishan, Shandong, and ion adsorption rare earth mine in South China. [0003] In 2005, the output of rare earth smelting and separation products in my country reached 103,900 tons, accounting for mor...

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Problems solved by technology

However, the evaporation and crystallization method consumes a lot of heat, the treatment cost is high, and the evaporation equipment is easy to scale and corrode, and the investment cost is high, which is difficult for enterprises to accept. It is only suitable for the recovery and treatment of salty wastewater containing high economic value. Therefore less application

At present, there is no relevant report on the organic wastewater treatment technology of ion-type rare earth wet smelting, and the concentration of organic matter in this kind of wastewater is high, which is very harmful to the environment.

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